Q.Below is a list of plant fibres. From which part of the plant these are obtained
a. Coir
b. Hemp
c. Cotton
d. Jute

Each of these commercial fibres comes from a different part of its source plant:

• Coir is obtained from the fruit — specifically the fibrous husk (mesocarp) surrounding the coconut.
• Hemp is a bast fibre, obtained from the phloem region of the stem.
• Cotton is obtained from the seed — it consists of long epidermal hairs that grow out of the seed coat. …

Commercially important plant fibres are drawn from a range of different plant organs, and the organ of origin determines both how the fibre is extracted and its properties:

• Coir, used in ropes and matting, comes from the husk of the coconut fruit — the fibrous mesocarp layer surrounding the coconut's hard shell.
• Hemp is a bast fibre, meaning it is extracted from the phloem (inner bark) region of the plant's stem, where elongated sclerenchymatous phloem fibres run alongside the conducting elements. …

Method: Sorting Fibres Into Groups by Plant Organ First

Rather than recalling each fibre's source individually, sort the four named fibres into groups based on which plant organ they come from, and notice that this sorting itself reveals a pattern worth remembering as a group, not four isolated facts.

Set up three organ-based groups to sort into: Fruit-derived, Stem(phloem/bast)-derived, and Seed-derived.

Sort each fibre:

• Coir → derived from the fibrous husk of the coconut FRUIT → Fruit group.
• Cotton → derived from hairs growing out of the SEED coat → Seed group.
• Hemp → derived from the phloem (bast) region of the STEM → Stem group.
• Jute → derived from the phloem (bast) region of the STEM → Stem group.

Notice the pattern once sorted: two of the four fibres (hemp and jute) land in the SAME group — both are "bast fibres," meaning both come from the same tissue type (phloem) in the same organ (stem) of their respective plants, and can be remembered together as a pair rather than as two separate facts. The other two fibres (coir, cotton) are each the sole representative of their own group and don't need to be paired with anything. …